Proportional valve



Nov. 1, 1932. G. F. NAAB ET AL 1,385,130

PRoPoRTIoNAL vALvr:

Fiied May 2s. 1929 ATTORNEYS Patented Nov.. 1,1932j GEQRGE 1f- .lree elwGEORGE R 330m,

Noam

' 'i RATIQN QF] 01.1.1@

, Application ile,V lVlay 2.3,

This invention relates to valve means for controlling'gas burners andmore particularly to so-called proportioning control units wherein theproportion of airand gas-flowl to a burner may be adjusted as byadjustment l of either air -or lgas low independent .of the both may becontrolled as a single line.y Such flow of the other for eecting theproper combustion conditions; and wherein v,tlowto the burner maythereafterbe controlled rfrom zero to maximum without affecting the pro`portion. Y

This invention contemplates in such a unit air valve means adaptedforarrangementin the -air supply'line and gas valve l means adapted forarrangement in the gas supply line whereby these linesmay becarriedrseparately'up to the burner so that neither line carriesexplosive mixture yet a burner supply arrangement is another ob ject ofthis invention. A L

The invention also contemplates an arrangement of'the parts-wherebythemaximum gas valve opening mayy vbe v adjusted without interruption toflow inthe gas line;

and similarly whereby air flow opening adjustment may be had withoutinterruption to air ow. 1

A further object of our inventionis to provide a V unit valve assemblywherein Yfriction during operationis reduced to a minimum yetprovidingajseal for the gas controlling parts. ,f l

The exact nature of' our invention; together with furtherobjects'andadvantage's thereof will be apparent Vfrom the followingdescription takenY in connection with the1accompanying drawing in whichFig. 1 shows in elevation a burner and controlzunit installation of theimproved type made possible byour invention; Fig. 2 is a sectionaleleva'- tion throughthe control unit as in a planeparallel to -that ofFig. 1 ;,Fig. 3 is asectional el@n vation of the par-tsV appearingv inFig. 2 taken in a plane at rightangles thereto; Fig. 4f. is' a plan'viewof parts appearing -in Figs.r `,2 and 3; and Fig. 5 isyalhorizontal,sec-tion as in the plane of line 5"-5, Fig. v2. Y Y Vithreference nowto the drawing,V 1i is a Casing, .having adorn@ rortignfatit-S. upper y y 0F crnvnrennenro, AssIGnons 'rorrnn AMElcg-NMANUFAGTURINGCOMPANY, QF CLEVEeeND, @e199 e 00,310:

gorggwiemg verw@ i929. serial 119.7365368.

enflfthgebelewopposed air inlet and ,outlet renngs and. 4 respegtvelypreferably flanged asfndiated for Connection in an( air Supply line fore ges,- burner, andY having e mouth opening downwardly below theopenings?) and 4. The casing 1 is generally l(zy-- lindrical inVhorizontal section' so that ythe `dome and those portions between theopen'- ings 3 and l-have cylindrical walls, the mouth 5 being thereforecircular, v

The mouth of the casing is closedby the flangeportion 6 of a covermember 7 which cover member extends downwardly and centrally 'from thecasing 1 has a cylindri` calcavity 8 opening downwardly. r Apap:closureQ is threaded into the mouth of the cavity 8.. The member 7 isprovided with lateral openings 10 and V,llorgas inlet outlet to thecavity 8v as willappearlV 1 .n It will 'be'apparentthat the parts 1, 7and 9,

in their illnstratedasse'mbly comprise casing means .having a pair ofchambers land, inlet air .valve 17 being associated with the nozzle iair inlet and arglobe type gasvalye 18 being associated withthe-nozzlegas inlet, suitable other pipe fittings vbeing employed for Aeftect-`ing the described connections as indicated. It will be apparent thatthe. lines 12 a'ridll may be as long as desired and may include fititings other than those shOWIl .andsuitable to Y the installation. n i

As shown'infthe ,drawing the inlet and ontlet openings 3 and t of theproportioningunit are at rightangles tothegas inlet' and outlet openings10 and 11 sof-that/ elbows 19ers iljn-y eluded in the line 14 to bringthis -line parallel with the line 12. airjand gas openings of theproportioning unit may, howeverpbe Y parallel,` obviously, withoutkdeparture *from having a transverse through opening 21 and rotatable toregister with or close the openings 10 and 11 in the cover member 7.These openings 1() and 11 and the opening 21 are preferably ofrectangular form so that as the valve 2O uncovers its port openings 10and 11, the port area for flow of gas will be in direct proportion tothe angular adjustment of the valve. j l

The valve 20 has a cylindrical hollow, opening downwardly and threadedup to and into the zone of the ports 10, 11 to receive a plug 22. Thusthe plug 22 may be adjusted longitudinally of the valve, to control themaximum port opening thereof. The upper end of the valve 20 is bared toreceive with a tight fit the lower extremity of a spindle 23 which mayhave pinned connection with the valve as at 24. The'spindle 23 extendsthrough an opening 25 in the cover member 7 and there- 'above beyond theupper extremity of the casing 1 as indicated.

The casing 1 is provided with an opening 26 in which is fitted the headportion 27 of a sleeve member 28, the sleeve member having a bushingportion 29 fitted in the opening 26, and therebelow a threaded extension30. The parts last described including the valve 2O and the sleeve 28are aligned as indicated; and the opening 25 in the cover member 7 issufficiently larger than the spindle 23 to clear the salne. Thus thespindle is supported on the one end by the valve 2O and on the other bythe sleeve member 28 acting as a bushing in the casing 1. Ahandle 31 issecured with the projecting end of the spindle 23 as by a set screw 32and preferably the end of lthe spindle is slotted as at 33 in thedirection of the opening in the valve 2() to indicate the setting ofthis valve.

Within the chamber of the casing 1 is an air valve 34 having at itsupper end a hub portion 35 fitting upon a cylindrical shoulder 36 of thesleeve 28, and having a spider 37' with a central hub portion 38 throughwhich the spindle 23 passes. The valve 34 is secured for'rotation withthe spindle as by set screw 39'in the hub portion .38 thereof. The valve34 is generally cylindrical at its periphery but is interrupted as atintervals of approximately 90 to form a pair of opposed seg'- mentalskirt portions 40. Obviously the skirt portions 40, extending into thezone of the openings 3 and 4 may be moved betw-een closed positionoverlying the openings, and

open position in which the openings are uncovered. I Preferably, theopenings 3 Vand 4 are rectangular, so that the air valve will havestraight line opening and closing' characteristics as described for thegas valve.

The valve skirt portions; 40 in the zone of the ports 3 and 4, arefinished outside to just clear the corresponding inner cylindrical wallof the casing 1, so that there is no bearing between the valve 34 andthis wall. Thus the valve 34 moves freely yet serves to substantiallycut ofl:l flow between the ports 3 and 4 V.27 of the sleeve 28.

Aboutthe spindle 23 between .the spider hub 38 and the cover member 7 isacompression spring 44, which serves to maintain the valve 20seatingupwardly against the cover member 7, thus preventing escape gfgas upwards between the two valve chamers.

A washer is arranged at the extremity of the extension 30 of the sleevemember 28. The spider hub 38 has a cavity 46 ,forming an annular grooveabove the spindle 23. In this groove is positioned a compression spring47 which bears upwardly upon the washer 45 to maintain the sleeve member28 bearing against the hub'portion 48 of the handle member 31.V Y

It will be apparent that by manipulation of the handle 31 the flow ofboth air and' gas may be simultaneously controlled between substantially"zero and maximum limits. Also, the maximum air .flow may be adjustedVat any time independent of the seatingvof the handle 31 and of theadjustment of the gas valve, by rotation of the head 27. Likewise, byremoval of the cap 9 and adjustment of the plug 22 the maximum gas iowmay be adjusted independent of the seating of the handle 31 and of theair valve. And air or gas flow may be adjusted asrto maximum withoutinterruption to service of the proportioning control unit.

It will vbe further noted that by the arrangement described no explosivemixture is present anywhere in the system up to the burner nozzleitself;and this will be true whether a single nozzle as shown, or a number ofnozzles by the usual manifolding arrangement, be employed. 1

What we claim is:

1. A proportioning control unit for a gas Aburner comprising a casinghaving a cavity with inlet and outlet openings and a mouth, Y

a cover for said mouth,'said cover having a cavity with inlet and outletopenings and a mouth, and a cap for said last named mouth, wherebycasing means are had, having' a pair of chambers and-inlet and Outletopenings for each chamber, one of said chambers being adapted forarrangement in the air supply to said burner and the other chamber CTIfor arrangement in the gas supply line there-V to, valve means in eachchamber for controlling flow between said openings thereof, and meansconnecting said valvemeans forsiinultaneous operation. n

2. A proportioning control unit for a gasy Vburner comprising easingmeans having a p'air of chambers with inlet and outletopenings for each,valve meansV in eaenchamber for controlling flow between said openingsthereof, said casin between said cham ers, said wall having an opening,a stem extending through said walll opening to connect said valve meansfor simultaneous operation, and spring means ar' opening to oonnect saidvalve means for simultaneous operation, and spring means arranged in oneof said chambers and associated with said steml to cause the valve meansin the other chamber to bear upon said wall about said opening toprevent flow between said chambers. Y i 4. A proportioning control unitfor a gas burner comprising casing means having a 'pair of chambers witha separating wall therebetween and inlet and outlet openings for eachchamber, one of said chambers be-V ing adapted for arrangement in theair supply to said burner and the other chamber for arrangement in thegas supply line thereto, valve means in each chamber Afor controllingflow between said openingsV thereof, and means extending through saidwall and connecting said valve means for simultaneous operation, saidwall providinga seat for one of said valve means. Y

5. In a proportioning control unit of the means including a Vwall andthe other ehamber for arrangementinl the gas. supply line thereto,Cylindrical valve' Y means in each chamber for controlling flow' betweensaid openings thereof, means conneoting said valve means forsimultaneous operation,` said air valve means being of less diameterthan its chamber, said gas valve means being arranged for supportingsaid vair valve means to clear the walls of its chamber.

- 7 A proportioning control unit for a gas burner comprising casingmeans having 'a pair of Cylindrical chambers and lateralinlet and outletopenings for each chamber, one' of said chambers being adapted `forarrangement in the 'air supply line to said y burner and theotherchamber for arrangement in the gas supplyy line thereto,cylindrical valve means. ineaoh chamber for oontrolling flow betweensaid openings thereof and having portsad'apted for registry with saidopenings for allowing said flow, means i connecting said valve means forsimultaneous rotational operation, and for' each valve, means movablelongitudinally thereof fo-r 'adjustment of its maximum effective portarea independently of the other and without interruption to the flowtherethrough.

In testimony whereof we hereby affix our signatures. Y GEORGE R. BROWN.

' GEORGE F. NAAB.

class described, casing means having a cylindrioal air chamber andlateraly inlet 'and outlet openings thereto whereby the chamber may bearranged in the air supply to a gas burner, cylindrical valve means ofless diam-V eter than that of said chamber arranged inl said chamber forcoaxial adjustment to control said openings,` and means for supportingsaid valve means to clear theewalls of said chamber, whereby the sainewill move freely between open and closed positions.

6. lA proportioning control unit for a gas burner comprising casingmeans having a pair of Cylindrical chambers and lateralinlet and outletopenings for each Chamber,

one of said chambers being adapted for' ai-,

rangement in the air supply to said burner v fn iria

